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let cc = new Array(1,2,3); console.log(cc);[ 1, 2, 3 ]
var ca = new Array(3); console.log(ca);[ <3 empty slots> ]var arr = Array.of(4);console.log(arr);[ 4 ]
js基础 Array.of
原文地址：https://www.cnblogs.com/angdh/p/14453888.html
